Yamaha Q2031B User Manual [en, de, es, fr]

YAMA HA

GRAPHIC EQUALIZER

EGALISEUR GRAPHIQUE

GRAPHISCHER EQUALIZER

ECUALIZADOR GRAFICO

Q2031B

GQ1031C GQ2015A

OPERATION MANUAL

MANUEL D'INSTRUCTIONS

BEDIENUNGSANLEITUNG

MANUAL DE INSTRUCCIONES

PRECAUTIONS

Avoid Excessive Heat, Humidity, Dust and Vibration

Keep the unit away from locations where it is iikeiy to be exposed to high temperatures or humidity — such as near radiators, stoves, etc. Also avoid locations which are subject to excessive dust accumuiation or vibration which could cause mechanical damage.

2. Avoid Physicai Shocks

strong physical shocks to the unit can cause damage. Handie it with care.

3. Do Not Open The Case Or Attempt Repairs

Or Modifications Yourseif

This product contains no user-serviceable parts. Refer all maintenance to qualified Yamaha service personnel. Open ing the case and/or tampering with the internal circuitry will void the warranty.

4. Make Sure Power Is Off Before Making Or

Removing Connections

Always turn the power OFF prior to connecting or discon necting cables. This is important to prevent damage to the unit itself as well as other connected equipment.

5. Handie Cabies Carefuiiy

Always plug and unplug cables — including the AC cord — by gripping the connector, not the cord.

6. Ciean With a Soft Dry Cioth

Never use solvents such as benzine or thinner to clean the unit. Wipe clean with a soft, dry cloth.

7. Aiways Use the Correct Power Suppiy

Make sure that the power supply voltage specified on the rear panel matches your local AC mains supply. Also make

sure that the AC mains supply can deliver more than enough current to handle all equipment used in your system.

IMPORTANT NOTICE FOR THE UNITED KINGDOM

Connecting the Plug and Cord

IMPORTANT. The wires in this mains lead are coloured in accordance with the fol lowing code:

BLUE :NEUTRAL BROWN :LIVE

As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug proceed as follows:

The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK.

The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED.

Making sure that neither core is connected to the earth terminal of the three pin plug.

* This applies only to products distributed by YAMAHA - KEMBLE MUSIC (U.K.) LTD.

FEATURES

• The two-channel system offers completely independent chan

nel control — from the input all the way to the output. (Q2031B, GQ2015A)

• The Q2031B/GQ1031C offers a narrow, 1/3-octave bandwidth and 31-band control over the entire 20 Hz to 20 kHz range for very precise equalization.

• The lU-size GQ2015A offers 15-band control on two inde pendent channels.

• Equipped with an EQ switch that bypasses the equalizer sec tion, a RANGE.switch that changes the equalization range and a host of other features the equalizer presents itself as a unit carefully designed from both functional and operational perspectives.

• The Q2031B features a high pass filter that allows setting the rolloff frequency using a slider, and the GQ1031C/GQ2015A is equipped with an 80 Hz high pass filter.

• Equipped with transformerless balanced XLR-type and phone

jack input and output connectors.

• Suitable for PA and recording applications and a variety of other uses.

• Can be mounted in a standard 19" rack.

_________________

CONTENTS_________________

FRONT PANEL............................................................................ 3

REAR PANEL.................................................................................5

TYPICAL CONFIGURATIONS...................................................... 6

ACOUSTIC CONTROL SPECIFICATIONS BLOCK DIAGRAM

................................................................

..........

...............................................................8

.........................................................................

DIMENSIONS ........................................................................ ...9

FRONT PANEL

Q2031B

GQ1031C

FRONT PANEL

O POWER switch

When this switch is pressed to turn the power on, the POWER indicator LED above the switch will light.

* To prevent click noise, the output is muted for approximately

two seconds after the power is turned on.

O RANGE switch

Allows selection of the boost or cut range for equalization. When this switch is off, the maximum range of +/-12 dB is selected; when on, the +/-6 dB range is selected. Use this switch to select the range suitable for each application. When the switch is on, the LED indicator to its left lights to show that the +/-6 dB range is in effect.

OHPF switch (Q2031B)

/^switch (GQ1031C/GQ2015A)

Allows switching the high pass filter in or out of the audio path. When the switch is on, the high pass filter is effective and the indicator LED lights. The Q2031B provides 12 dB per octave rolloff below the frequency set with the HPF con trol 0, while on the GQ1031C/GQ2015A the rolloff is 12 dB per cotave below 80 Hz. When the switch is off, the input signal goes directly to the equalizer section, bypassing the HPF. On the GQ2015Athe /80 switch turns the HPF on/off for channels A and B simultaneously.

O EQ switch

This switch determines whether the signal is routed through or bypasses the equalizer section. When the switch is off, the equalizer is bypassed and the settings of the equalizer controls O are ineffective, providing a flat frequency re sponse. When the switch is on, its indicator lights and the equalizer is switched into the audio path. The equalized sig

nal can be compared with the un-equalized signal simply by

alternately turning the EQ switch on and off.

LEVEL control

Allows precise control of the optimum input sensitivity. When the control is at the top of the scale, the input level remains unchanged (+4 dB). This control can be used to restore the output level when the overall level has been changed during the equalization pro cess. This, however, will also change the input level. Equal ization methods which do not change the LEVEL control set ting will yield a better signal-to-noise ratio and wider dynamic range.

Example:

than the settings in Fig. B.

• Boost/cut settings centered around the 0 dB point

E3E

ffWI

• Boost/cut settings off the 0 dB point

The settings in Fig. A will provide a better result

Fig. A

e3e3e:e3E;eIe3e3e:=

ziEg=:=:=iz3z:z3z3E:E:E3z:=3

Fig. B

0HPF control (Q2031B)

The HPF control sets the rolloff frequency for the built-in high pass filter. The control allows continuous adjustment over the range of 20 Hz to 200 Hz. Below the selected frequency there will be a 12 dB per octave cut. The filter is turned on/off using the HPF switch 0. The HPF can be adjusted to eliminate low-range standing waves, a resonance phenomenon that sometimes occurs in small indoor environments, vocal "pops" and wind noise in

microphones and AC hum.

FRONT PANEL

O Equalizer controls

Q2031B/GQ1031C:

The 20 Hz to 20 kHz spectrum is divided into 31 bands

(1/3 octave steps), and each of these bands is equipped

with an equalizer control that allows boosting/cutting the corresponding center frequency.

GQ2015A :

The 25 Hz to 16 kHz spectrum is divided into 15 bands

(2/3 octave steps), and each of these bands is equipped

with an equalizer control that allows boostIng/cuttIng the corresponding center frequency.

The scales on either side of the controls are calibrated to indicate the correct setting values when the RANGE switch is off (+/-12 dB

range). When the RANGE switch is on (+/-6 dB range), the true

values are one-half of the calibrated values.

Q2031B, GQ1031C

§. “

To get the best performance from your equalizer, it is important that you understand the frequency components that make up the

sounds of each musical instrument. The following graph is pro vided to aid this understanding. You should also bear In mind, that besides fundamental frequen

cies harmonics also can have a significant impact on timbre.

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BaiSt b 1

Bas itroi ib<n<

T on

rin psn

S iar<<1u n

dasc tJ

ylee :ritc

Syi^th<si :e

100 200 500 Ik

FREQUENCY (Hz)

riolin

sIt lO saxothoh»

ii rronie

bal

1 >et

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Frequency (Hz]

Frequency [Hz]

O SIGNAL and PEAK indicators

This SIGNAL indicator LED lights up when the output signal

level is within 13 dB below nominal level. The indicator con

firms that the current signal level settings are suitable.

The PEAK indicator LED lights up when the output signal

level reaches 3 dB below clipping level. If the PEAK indica

tor LED lights continuously, the overall level is too high and

must be reduced using one of the two following methods:

(1) By reducing the overall level with the LEVEL control (2) By reducing the levels of each equalizer band

REAR PANEL

Q2031B

GQ1031C

GQ2015A

O INPUT connectors

The equalizer is equipped with baianced XLR-type and 1/4"

phone jack input connectors. For both a 600 Q iine shouid be used. The rated input level is +4 dB.

• XLR-3-31 type connector

• TRS phone connector

•

Pin 1 : Ground

Tip: Hot (+)

Sleeve: Ground

Ring: Cold (-)

e OUTPUT connectors

The equaiizer is equipped with baianced XLR-type and 1/4" phone jack output connectors. For both a iine with the match ing ioad impedance of 600 £2 shouid be used. The rated out put levei is +4 dB.

• XLR-3-32 type connector

Pin 1 : Ground

Pin 2 : Hot (+)

TYPICAL CONFIGURATIONS

Insertion between the channel (master) insert out/in

Q2031B GQ1031CX2

insertion in the main iine of the output system

POWER AMP

ACOUSTIC CONTROL

The diagrams show the connection method for the Q2031B. The GQ2015A is connected in the same way. In case of the GQ1031C you will need two units for a two-channel setup.

Maintaining Ideai Indoor Propagation Characteristics

Speaker systems that demonstrate flat responses in anechoic rooms may have irregular responses in a concert hall due to acoustic conditions. The Q2031B equalizer can be used to minimize these irregularities. For smoothing of the playback system response a pink noise generator and a spectrum analyzer are needed. Connect the

noise is radiated from the speaker. While measuring the pink noise at strategic listening positions in the room using the spectrum analyzer, adjust the Q2031B until the preferred response is obtained.

POWER AMP SPEAKER

Ensuring Adequate Feedback Margins in Stage Monitor Systems

Depending on the room characteristics feedback can result in howling or ringing being generated at specific frequen cies. In such cases the equalizer can be used to reduce lev els at the affected frequencies and thereby to control the feedback, but a pink noise generator and a spectrum ana lyzer are again required. Set the equipment up just as for an actual performance, and connect the pink noise generator to a spare input connector of the mixing console and the spectrum analyzer to a spare output connector. After ensuring that pink noise is being prop erly radiated from all PA speakers and monitor speakers, gradually raise the output level until it is evident at which frequencies feedback will occur. Use the Q2031B to reduce the levels of these specific frequencies.

Proper adjustment will provide a safety margin against feed back when the output level is raised.

NOTE

Measuring instruments can only provide basic sound realism. After you have completed the indoor propaga tion and feedback compensation adjustments, make the final adjustments using the ultimate judge, vour trained ears.

A Pink Noise Generator

generates a uniform level of random noise throughout the audio spectrum. (Equal Energy per octave)

A Spectrum Analyzer

divides the audio spectrum into ranges and indicates the sound pressure for each range.

-OM

SPECTRUM ANALYZER

POWER AMP

SPEAKER

SPECIFICATIONS

Q2031B

FREQUENCY RESPONSE

TOTAL HARMONIC DISTORTION

HUM & NOISE

(Average, Rs=600Q BPF: 20Hz ~ 20kHz)

MAXIMUM VOLTAGE GAIN

EQUALIZER CONTROLS

Center Frequencies:

Variable Range:

HIGH

PASS

FILTER

(Rolloff Frequency)

PEAK LED INDICATOR

SIGNAL LED INDICATOR

POWER REQUIREMENTS

Less than 0.05% (THD+N), 20 Hz ~ 20 kHz @ +4 dB* 600Q, Equalizer...all flat (OdB)

31 band (1/3 octave) 20, 25, 31.5, 40, 50, 63, 80, 100, 125,160, 200, 250, 315, 400,500, 630, 800,1 k, 1.25k, 1.6k, 2k, 2.5k, 3.15k, 4k, 5k,

6.3k, 8k. 10k, 12.5k, 16k, 20kHz

12dB/octave

(20 ~ 200Hz at -3dB point.)

Red LED on each channel turns on when post-EQ signal reaches the level 3 dB below clipping.

Green LED on each channel turns on when post-EQ signal reaches the level 13 dB below nominal level.

GQ1031C

20 Hz ~ 20 kHz +0.5dB @ +4dB* 600Q

-96 dB* I -94 dB* I -96 dB*

Equalizer ... all flat (0 dB), Input Level ... Max.

0 dB, Input Level ... Max.

15 band (2/3 octave) 25,40,63,100,160, 250, 400, 630, Ik, 1.6k, 2.5k, 4k,

6.3k, 10k, 16kHz

+ 12dB/±6dB

12dB/octave (80Hz at -3dB point.)

U. S. & Canadian Models : AC120V, 60Hz General Model : AC230V, 50Hz

GQ2015A

POWER CONSUMPTION DIMENSIONS (W X H X D)

WEIGHT

480 X 93.4 X 230mm

20W

4.0kg

0 dB is referenced to 0.775V RMS.

INPUT SPECIFICATIONS

INPUT

Connectors

INPUT

(A, B)

Input

Impedance

Source

15 k£2

Impedance

600 Q

Lines

Sensitivity «Nominal Level

+4 dB (1.23V)

OUTPUT SPECIFICATIONS

OUTPUT

Connectors

OUTPUT

(A, B)

Output

Impedance

150 Q

Load

Impedance

600 Q Lines

Nominal Level

* The input level required to obtain the nominal output level. ** XLR-type connectors are balanced. 1=Ground, 2=+, 3=-

Phone jacks are balanced. T=+, R=-, S=Ground

• Specifications subject to change without notice.

Output Level

+4 dB (1.23V)

13W 15W

480 X 49.4 X 230mm

2.8kg

Input Level

Maximum

Before Clipping

+4 dB (1.23V) +24 dB (12.3V)

Maximum

Before Clipping

Connectors **

+24 dB (12.3V)

3.0kg

Connectors **

XLR-3-31 Type

Phone Jack (TRS)

XLR-3-32 Type

Phone Jack (TRS)

BLOCK DIAGRAM

Q2031B

GQ2015A

OUTPUT

•h4dB

CHANNEL A,B

CHANNEL A

OUTPUT

+4dB

GQ1031C

DIMENSIONS

W:480

OUTPUT

+4dB

Q2031B 360 93.4

GQ1031C GQ2015A

WI H Hp

402 49.4 44

Units: mm

EGALISEUR GRAPHIQUE

Q2031B

GQ1031C

Français

GQ2015A

MANUEL D'INSTRUCTIONS

PRECAUTIONS

1. EVITEZ LES TEMPERTATURES EXTREMES,

5. MANIPULEZ LES CABLES AVEC PRECAU

L’HUMIDITE, LA POUSSIERE ET LES VIBRA TIONS.

Evitez de placer l’appareil dans des endroits où il risque d’être exposé à des températures ou une humidité anormalement élevées. Evitez également les endroits poussiéreux et sou mis à des vibrations susceptibles d’entraîner des problèmes mécaniques.

6. NETTOYEZ L’EXTERIEUR AVEC UN CHIF

2. EVITEZ LES CHOCS.

Les chocs trop violents risquent d’entraîner des dommages internes. Manipulez l’appareil avec précaution.

7. UTILISEZ TOUJOURS LA TENSION D’ALI

3. N’OUVREZ PAS LE COFFRET ET N’ES SAYEZ PAS DE MODIFIER OU DE REPA RER L’APPAREIL PAR VOUS-MEME.

Cet appareil ne contient aucun élément que l’utilisateur pour

rait réparer par lui-même. Confiez tout travail de réparation

ou de révision au personnel qualifié du service après-vente Yamaha. L’ouverture du coffret et/ou toute tentative de bri colage avec les circuits internes entraîner automatiquement l’annulation de la garantie du produit.

TION.

Branchez et débranchez les câbles — y compris le cordon d’alimentation — en les tenant par la fiche, pas par le cor don.

FON DOUX ET SEC.

N’utilisez pas de dissolvants tels que le benzène ou les diluants pour peinture pour nettoyer l’appareil. Utilisez uni quement un chiffon doux et sec.

MENTATION CORRECTE.

Assurez-vous que la tension d’alimentation spécifiée sur le panneau arrière correspond à la tension secteur locale. As surez-vous également que vous disposez d’assez de cou

rant pour faire fonctionnner tous vos appareils.

4. ASSUREZ-VOUS QUE L’APPAREIL EST

HORS TENSION AVANT DE CONNECTER OU DE DECONNECTER DES CABLES.

Mettez toujours l’appareil hors tension avant de connecter ou de déconnecter des câbles, afin d’éviter d’endommager

cet appareil ainsi que le matériel qui y est connecté.

CARACTERISTIQUES

• Le système à deux canaux offre un contrôle complètement

indépendant de chaque canal - depuis l'entrée jusqu'à la sor tie. (Q2031 B,GQ2015A)

• Le Q2031B/GQ1031C offre un contrôle d'une étroite bande passante d'un tiers d'octave et de trente et une bandes sur la gamme entière de 20 Hz à 20 kHz pour une égalisation très

précise.

• Le GQ2015A de format 1U offre le contrôle de quinze bandes sur deux canaux Indépendants.

• Equipé d'un interrupteur EQ qui met la section égaliseur en dérivation, d'un commutateur RANGE qui change la plage d'égalisation et d'un grand nombre de caractéristiques, l'égaliseur se présente comme une unité soigneusement con çue dans une perspective fonctionnelle comme dans une perspective opérationnelle.

• Le Q2031B se caractérise par un filtre passe-haut qui permet de régler la fréquence d'amortissement par curseur et le GQ1031C/GQ2015A est équipé d'un filtre passe-haut de 80

Hz.

• Equipé de connecteur du type XLR symétrique sans transfor

mateur et d'une entrée de prise de jack TRS et de connecteurs de sortie.

• Convient aux applications PA et d'enregistrement et à une variété d'autres utilisations.

• Peut être monté sur un rack standard de 19 pouces.

_________________

CONTENTS_________________

FACE AVANT............................................................................ 14

FACE ARRIERE.......................................................................... 17

CONFIGURATIONS TYPES COMMANDE ACOUSTIQUE CARACTERISTIQUES TECHNIQUES

.......................................................

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SCHEMÀ DE PRINCIPE............................................................. 21

DIMENSIONS ..............................................................................22

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